Finding the Fourth Proportional to 17,128.24, 25,689.12 and 5,441.56

Step by Step Solution

1. Step 1: Write the proportion equation
   17,128.24 : 25,689.12 = 5,441.56 : x
2. Step 2: Convert to fraction form
   17,128.24/25,689.12 = 5,441.56/x
3. Step 3: Cross multiply
   17,128.24x = 25,689.12 × 5,441.56
4. Step 4: Simplify right side
   17,128.24x = 139,788,887.83
5. Step 5: Solve for x
   x = 139,788,887.83/17,128.24
6. Step 6: Final answer
   x = 8,161.31